Updates the site's loyalty program.
The updateLoyaltyProgram() function returns a Promise that resolves when the loyalty program is updated.
With the updateLoyaltyProgram() function you can update the name of the loyalty program and the details of the collectible points unit. To activate the loyalty program use the activateLoyaltyProgram() function.
Note: Only visitors with Manage Loyalty permissions can update a loyalty program. You can override the permissions with the wix-auth elevate() function.
You can only call this method when authenticated as a Wix app or Wix user identity.
Loyalty program fields to update.